Sound transmitting



6.1. CARLISLE.

SOUND TRANSMITTING APPLIANCE.

APPLICATION FILED AUG.6]1919.

Patented Oct. 26, 1920.

W l l i Zlll UNITED STATES GEORGE J. CARLISLE, OF CHICAGO, ILLINOIS.

SOUND-TRANSMITTING APPLIANCE.

Application filed August 8, 1819.

To all vi i/om. it may concern:

Be it known that I, Urnonon J. CARLISLE, a. citizen of the UnitedStates, residing at Chicago, in the county of Cook and btete ofIllinois, have invented certain new and useful Improvements inSound-Transmitting Appliances, of which the following is aspecification.

My invention relates to improvements and features of novelty andstructural and functional advantages in sound recording and reproducingappliances. such for example, as phonographs, dictephones, etc. Whenemployed with sound reproduction devices its main object is theprovision of airspparatus of this character which will faithfullypresent the recorded sound from a record with adequate volume, true tonevalues, di-licate shadings of expression, and Without rasping orscratching intrusions which are fully suppressed or mute-d. A furtherobject or purpose of the invention is the produ tion of an appliance ofthis type which will reproduce sound accurately and 26 with properamplification and volume from all s es of phonograph records, bothlateral out] vertical cut. An additionalsalient feature oi the inventionis improved and novel for modulating or changing the 30 volunu: orintensity of the sound without interfering with its character ormmilifying its quality or timbre. To the accomplishment oi these andother desirable ohjects various cooperative stru tural features are 85incorporated in the soundhox, in the diaphragm and its mounting, and inthe. stylus device for transmittingthc vibrations to the diaphragm.

In order that those skilled in this art may have a full and completeunderstanding of the invention and its various advantages I luslratcd inthe accompanying drewings, forming a. part of this specification, epreterm-ll and desirable embodiment of the some. like referencecharacters referring to the sanu' parts throughout the various views. Inthis drawing: Figure 1 is an elevation of the improved appliance:

Fig. 2 is a section on line 2-2 of Fig. 1;

Fig. 3 is a bottom face view of the structure showing the mounting ofthe needle or stylus: F g. l lur-vs the struolur'e With one portion. 1.the casing or shell removed, illus Specification of Letters Eatent.

Patented Oct. 26 1920. Serial No. 815,606.

trating the construction of the embossed or ribbed diaphragm moreclearly;

Fig. 5 is 3, face view of the slide for controlling the opening andclosing of the epertures in the diaphragm casing or soundbox;

Fig. 6 is an enlarged fragmentary detail section, illustrating theinternal cavities in the sound-box, the diaphragm, and its gaskets;

Fig. 7 is an enlarged section of the mounting for the vibratory or rockplate carrying the stylus; and

Fig. 8 is a perspective view of the adjusting mechanism for one of thefulcrums.

Referring to the drawings it will be perceived that the embodiment ofthe invention shown therein. comprises a sound-box or diaphragm shell orcasing including two parts 10 and 11 held together or in assembledrelation by any approved means, such as one or more screws. The part 10of this hollow shell has a central aperture 12 couinninicating with a.tone-arm or sound-50 transmitting tulle 13 of the usual type. a portiononly of which is shown in the drawings. Around, the outer side portionof such member I provide it plurality of enlargements or hosscs H; (inthe present instance six) which inside of the shell or casing supplycorresponding spaced recesses or cavities 15. The companion hell-member11 is similarly equipped with an equal number of outstanding projections16 forming internal cavities 17 in register with the recesses 15'.

The thin disk diaphragm l8. desirably of nit-tel, spring brass 'l' orinstance. coated with,

a relatively soft material such as beeswax to eliminate any metallicsound. is preferrihly provided with a series of integral hollow ribs 19struck up or embossed out of the body of the shoot of metal andradiating from the center thereof to some what stiffen such centralportion of the vibratory diaphragm to enihlo the soundtransmitting;member 20 connected to its router in the usual way to art over a.greater middle area of the diaphragm rather than merely at its geometriccenter only.

The flat peripheral or circular unribbed or uncmbossod margin of thediaphragm is held between the two cooperating companion parts of thesound-box or shell between 'a pair ol' circular gaskets 2i and 22. de-

sirably nlllilll rubber tubes 23 equipped in,-

to the tone-arm.regardless of the type of rec ifd used may be varied byshifting the pos l'rion of plate 31 so .as to open or close -moreor lessthe apertures 32 in the diaall'c ifiperate and interact to reproduce therecorded sound with fidelity,

suitable volum' ind adjustable intensity. It will be ob served'that thevibrations are imposed endwise on the spring 20 which transmits themside vise or at right angles thereto to the dia iragm.

heroes, in this application and the accompany ng drawing,

a single simple embodi nenliof the invention has been presented a shellconstituting a sound-box,

ans

the latter having a it will be understood by those skilled in this artthat the invention is not limited and rdstricted to such embodiment butis capable of i: corporation in appliances of this general typ but ofradically different structural features. Stated somewhat differently theinvention is not restricted to the precise and exact features ofconstruction resented becatise these may be. changed wit in comarativelywide limits without departure roin the substance of the invention andwithout the sacrifice of any of its substantial benefits and advantages.

I claim:

1. In a sound-transmitting appliance of the character described, thecombination of a shell constituting a sound-box having a plurality ofinternal cavities, and a vibratory diaphragm nfounted in said shell,substantially as described.

2. In a sound-transmitting appliance of the character described, thecombination of and a vibratory diaphragm mounted in said shell,thelatter having a plurality of internal cavities on both sides of thediaphragm, substantially as described.

3. In a sound-transmitting appliance of the character described, thecombination of a shell constituting a sound-box, and a vibratorydiaphragm mounted in said shell, lurality of internal cavities locatedto a ord passages around the edge of'the diaphragm, substantially asdescribed.

4. In a phonograph, the combination of a shell constituting a sound-box,a tone-arm connected to said shell, a vibratory diaphragm mounted insaid shell, the latter having a lurality of internal cavities locsitedto a ord passages around the edge of the diaphraglm, whereby the airpulsations from both sites of-the diaphragm are transmitted to saidtone-arm, and means connect- .against which ed to said diaphragm adaptedto coact with a sound record, substantially .as described.

5. In a sound-transmitting appliance o the character described, thecombination of a shell constituting a sound-box, a vibratory diaphragmmounted in said shell, the latter having a plurality of internalcavities adjacent to the edge of the diaphragm, and a gasket betweensaid shell and diaphragm against which the latter bears, the gasketbridging said cavities, substantially as described.

6. In a sound-transmitting appliance of the character described, thecombination of a shell constituting a sound-box, a vibratory diaphragmmounted in said shell, the latter having a plurality of internalcavities adjacent to the edge of the diaphragm, a gasket between saidshell and diaphragm the latter bears, the gasket bridging said cavitiesand comprising a resilient tube with a stiffening wire through its bore,substantially as described.

7. In a sound-transmitting appliance of the character described, thecombination of a shell constituting a soundbox, a vibratory diaphragmmounted in the shell, the latter having a plurality of internal cavitieslocated to afford passages around the edge of the diaphragm, gaskets onopposite sides of the diaphragm between the latter and the shell, saidgaskets bridging said cavities and being formed of resilient materialthrough the bores of which extend reinforcing or stiffening wires,substantially as described.

8. In a soundtransmitting appliance of the character described, thecombination of a shell constituting a sound-box having a plurality ofinternal cavities, and a vibratory diaphragm mounted in said shell, thelatter having one or more apertures through its wall leading directly tothe outer air, substantially as described.

9. In a soundirnnsmitting appliance of the character described, thecombination of a shell constituting a sound-box having a plurality ofinternal cavities, a vibratory diaphragm mounted in said shell, thelatter having one or more apertures through its wall leading directly tothe outer air, and adjustable means governing the cxthnt of opening ofthe aperture or apertures, sub stantially described.

10. In a phonograph of the character dcscribod, the combination of ashell constituting a sound-box having a plurality of internal cavities,a vibratory diaphragm mounted in said shell, a tone-arm connected tosaid shell on one side of said diaphragm, the shell having one or moreapertures to the atmosphere through its wall on the opposite side of thediaphragm, and means to vary the extent of opening of the aperture or upertures, substantially as described.

11. In a phonograph of the character deswiii cd, {he fionzbinziiion of:5: shall cnnstitut ing :1 soundbcix, a vibrato diaphragm mounted insaid shulL s tnm-urm connected u; aid she mi nun side uf said diaphragm,1M siwll having :1 piuz'siiiiy M interlmi cuvihis iuczued afford 1m. esaround [he wigv of the diaphragm and U1lior more openings tn theatmnsphnre through its wall on the side (if time diaphragm opposite saidtmw arm substantizziiy described.

In a pimnugrapii w lim: 1' Fatimdescribed, the UEHFlifiii'hUEHI] !If n snnstiiut ing :1 sound-box. a ."ii iiiiui diaphragm munted m said six-11,inns-arm (animated to said size (In one sidv mi said diaphragm tho slmiihaving: :1 pin! uf iuhjl'llfli cnvi tics lwcaawd tn niiurd 1 issn gesaround the edge ni the? din m and me or more 05x 1.

w s in the ii illbupiii iii i1 (nigh its wall on. the side of thediaphragm opposite said tum: arm, and means to vary the"extent ofopening of said aperture 01' apertures, substantially is described.

13, A snund-transmitting applianceinminding in combination a, vibratorydiaphragm, a vibration-tramsmitting leaf spring bearing between its endson said diaphragm, and means u impart sound vibrations endwise in saidspring, substantially as dosvribcd.

14. A sum]( l-transmitting appliance including in combination anvibratory disphmgrn a. bnwed vibration transmitting leaf spring hearingbetween its ends on said dilpillalglll, and means t0 impart soundvibrations sndwise to said spring, substanmany as described.

GEORGE J. GARLISLE.

